The Patch Tuesday for June 2023. Microsoft releases several cumulative updates targeting Windows 10 and Windows 11. Security is a focus, but there are also improvements.
Every second Tuesday of each month, Microsoft publishes security updates for its entire software ecosystem. This covers Office and Windows, for example. This content is made available through various distribution channels.
Please note that Microsoft is deploying a patch for a Windows kernel vulnerability, but the patch is not enabled by default. The flaw affects Windows 10 v1607, 1809, 20H2, 21H2 and 22H2, Windows 11 v21H2 and 22H2, and Windows Server 2022. To enable the patch (KB5028407), you must set a Registry key value according to your operating system. Microsoft does not explain why this patch is not enabled by default.
Another notable highlight of this Patch Tuesday is the end of support for Windows 10 v21H2. No further updates will be released for the Home, Pro, Pro Education, and Pro for Workstations editions.
Windows 10 and Windows 11, dozens of vulnerabilities patched.
Windows 10 21H2 and 22H2 are affected by 29 vulnerabilities, four of which are deemed critical and 25 important. Microsoft fixes a flaw in Hyper-V allowing a denial of service (CVE-2023-32013) and three security issues in PGM allowing remote code execution (CVE-2023-32015, CVE-2023-32014 and CVE-2023-29363). PGM stands for Pragmatic General Multicast.
For its part, Windows 11 21H2 is affected by 29 vulnerabilities, of which 4 are critical and 25 are important. Among these are the Hyper-V vulnerability (CVE-2023-32013) and the three PGM issues enabling remote code execution (CVE-2023-32015, CVE-2023-32014, and CVE-2023-29363). Windows 11 22H2 is affected by the same critical flaws and has a total of 31 vulnerabilities.
Patching all of these components is handled through cumulative updates
- - KB5027215 –> Windows 10 21H2 et 22H2,
- - KB5027223 -> Windows 11,
- - KB5027231 -> Windows 11 22H2.
Downloading and installation are handled by the Windows Update service. It is also possible to retrieve them manually for an offline installation. Here are the direct links:
- - KB5027215 for Windows 10 21H2 and 22H2,
- - KB5027223 for Windows 11,
- - KB5027231 for Windows 11 22H2.
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